VEGA VEGAFLEX 52P (Profibus PA) - Manual (Page 21)

VEGAFLEX 51P and 52P 21
Mounting
Moisture
Cable entries
When mounting outdoors, on cooled vessels
or in humid areas where cleaning is done e.g.
with steam or high pressure, the seal of the
cable entry is very important.
Use cable with a round conducting cross-
section and tighten the cable entry. The cable
entry is suitable for cable diameters of 5 mm
to 9 mm.
Moisture from outside
To avoid moisture ingress, the electrical con-
nection cable should be looped downward
behind the cable entry so that rain and con-
densation water can drain off.
This is mainly valid for mounting outdoors, in
areas where humidity is expected (e.g. by
cleaning processes) or on cooled or heated
vessels.
Cable electrode in solids
Anchoring
In general, the measuring result will be no-
ticeably influenced if the gravity weight
comes into contact with the vessel wall. De-
pending on the kind of solid, the installation or
the kind of filling, the cable can "float" in spite
of the gravity weight. The solid can push the
cable to the vessel wall or to the top, causing
incorrect measured values.
If this happens, anchor the cable. When
straining the cable, avoid high cable tension.
In our price list, you will find a spring (as
accessory) which prevents overloading of
the cable.
Please note that in solids, strained cables
must be able to resist strong forces. In case
of strong extracting forces, the cable should
not be anchored. Please note the paragraph
"Extracting forces".
Buildup
Generally, buildup on the cable will cause
only slight changes of the measured value. If
strong buildup on the cable is expected, the
use of insulated cable is recommended. The
higher surface quality prevents buildup.
Abrasion
In very abrasive products, e.g. in loose
chippings, use a measuring cable without
insulation.
Socket
Sockets cause strong interfering reflections.
Therefore avoid socket mounting. If this is not
possible, choose the flattest socket possible
and use a socket with a diameter of at least
600 mm.